fix: colors not working in trip layer of TABLE mode

[lixun910]

In TABLE mode (when using columns like id/lat/lng/timestamp instead of GeoJSON), the trip layer groups rows by ID to create features. Each feature has:

• properties.index - the feature index (0, 1, 2, ...), NOT a row index
• properties.values - an array of all materialized rows belonging to this trip

The bug is in formatLayerData:

const dataAccessor = () => d => ({index: d.properties.index});

This returns {index: featureIndex}, but when valueAccessor({index: featureIndex}) is called, it looks up row featureIndex in the data container, which is the wrong row.

For TABLE mode, the dataAccessor should return the first row from properties.values:

if (this.config.columnMode === COLUMN_MODE_GEOJSON) {
  dataAccessor = () => d => ({index: d.properties.index});
} else {
  // TABLE mode: use the first row from properties.values
  dataAccessor = () => d => d.properties.values[0];
}